Portable oil well walking beam pump jack



FIG. 1 is a right side elevational view of the portable oil well walkingbeam pump jack which incorporates my new design, disposed in a foldedposition;

FIG. 2 is a right side elevational view thereof which incorporates mynew design, disposed in a raised position;

FIG. 3 is a left side elevational view thereof illustrated in FIG. 2;

FIG. 4 is a rear elevational view thereof illustrated in FIG. 2;

FIG. 5 is a front elevational view thereof illustrated in FIG. 2;

FIG. 6 is a top plan view thereof shown in FIG. 2; and

FIG. 7 is a bottom plan view thereof illustrated in FIG. 2.

The ornamental design for a portable oil well walking beam pump jack,substantially as shown and described.